The patent badge is an abbreviated version of the USPTO patent document. The patent badge does contain a link to the full patent document.
The patent badge is an abbreviated version of the USPTO patent document. The patent badge covers the following: Patent number, Date patent was issued, Date patent was filed, Title of the patent, Applicant, Inventor, Assignee, Attorney firm, Primary examiner, Assistant examiner, CPCs, and Abstract. The patent badge does contain a link to the full patent document (in Adobe Acrobat format, aka pdf). To download or print any patent click here.
Patent No.:
Date of Patent:
Sep. 06, 1988
Filed:
Jan. 23, 1987
Bruce R Johnson, Sebastopol, CA (US);
Jandy Industries, Novato, CA (US);
Abstract
A low profile carriage is mounted on widely spread wheels to roll along the underwater surfaces of a swimming pool. The carriage is propelled by a high velocity stream of water projecting from a rearwardly directed thrust nozzle. There is a venturi restriction just forward of the thrust nozzle, creating a low pressure zone that induces flow of water through the bottom of the carriage, drawing in leaves and other debris. The water so drawn in passes through a screen, trapping the debris in a removable pod or bin depending from the carriage. The top of the carriage is relatively flat and the depending debris pod is curved downward to form an inverted air foil, whereby the pressure differential between the top and bottom of the carriage biases the carriage against the swimming pool surface traversed thereby.